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Journal of Applied Sciences
Year: 2012  |  Volume: 12  |  Issue: 13  |  Page No.: 1396 - 1401

Effect of Oxides Nanoparticle Materials on the Pressure Loss and Heat Transfer of Nanofluids in Circular Pipes

Hyder H. Balla, Shahrir Abdullah, Rozli Zulkifli, Wan Mohd Faizal and Kamaruzaman Sopian    

Abstract: Laminar flow and heat transfer of different nanofluids particles in water, namely Al2O3, CuO and TiO2, flowing through a circular tube under constant heat flux conditions have been numerically analyzed. The investigation was performed for nanoparticles of size 100 nm. The numerical results obtained are compared with existing well-established correlations. The prediction for the Nusselt number for nanofluids agrees well with the Pak-Choi correlation. The thermophysical properties of the nanofluids are estimated by using the equations available in literature. Comparison of convective heat transfer coefficients for Al2O3, CuO and TiO2 based nanofluids are presented. It is found that pressure loss increases with the particle volume concentration. However, the flow demonstrates enhancement in heat transfer which becomes better with the increase in the Reynolds number of the flow, but is accompanied with an increase in shear stress.

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